The circumference of a circle with radius r is given by:
[tex]C=2\pi\cdot r[/tex]
The area of a circle with raidus r is given by:
[tex]A=\pi\cdot r^2[/tex]
Then for a cirlce of radius 7ft we have a circumference of:
[tex]C=2\pi\cdot7ft=2\cdot3.14\cdot7ft=43.96ft[/tex]
And an area of:
[tex]A=\pi\cdot(7ft)^2=3.14\cdot49ft^2=153.86ft^2[/tex]
Then the answers are:
Circumference: 43.96ft
Area: 153.86ft²
